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Getting Your Sea Legs.

Thomas A Stoffregen1, Fu-Chen Chen, Manuel Varlet

  • 1Affordance Perception-Action Laboratory, University of Minnesota, Minneapolis, Minnesota, United States of America.

Plos One
|July 11, 2013
PubMed
Summary
This summary is machine-generated.

Adapting to sea travel involves significant changes in body control, known as getting one's sea legs. This study reveals how postural sway dynamics predict seasickness and mal de debarquement in maritime novices during a sea voyage.

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Area of Science:

  • Human physiology
  • Neuroscience
  • Maritime studies

Background:

  • Adapting to the dynamic environment of sea travel requires significant adjustments in bodily control.
  • The process of adaptation to ship motion is commonly referred to as "getting one's sea legs."
  • Previous research has not experimentally investigated the dynamics of postural control during this adaptation period.

Purpose of the Study:

  • To conduct the first experimental investigation into how maritime novices adapt their bodily control to ship motion at sea.
  • To evaluate the role of the visible horizon in modulating body sway.
  • To correlate postural activity with subjective experiences of seasickness and mal de debarquement.

Main Methods:

  • Experimental study involving maritime novices on a sea voyage.
  • Measurement of postural activity, including stance width, stance angle, and kinematics of body sway, before and during the voyage.
  • Assessment of the influence of the visible horizon on body sway control.
  • Correlation of postural data with self-reported seasickness and mal de debarquement severity.

Main Results:

  • Significant and rapid changes in postural activity were observed in novices adapting to sea conditions.
  • Pre-voyage body sway dynamics predicted the subsequent severity of seasickness.
  • Body sway patterns measured at sea were associated with the later experience of mal de debarquement.
  • The visible horizon was investigated for its role in controlling body sway.

Conclusions:

  • Postural control undergoes rapid adaptation during sea travel, with distinct patterns related to subsequent motion sickness experiences.
  • Individual differences in body sway dynamics before and during a voyage are linked to susceptibility to seasickness and mal de debarquement.
  • Findings offer insights into perceptual-motor adaptation, the etiology of motion sickness, and theories of bodily orientation control.